Improvement in steam-engine governors



construction.

JOSEPH FARCOT, OF ST OUEN, (seine) FRANCE.

Letters Patent No.' 87,034, dated February 16, 1869.

IMPROVEMENT IN STEAM-ENGINE Govnm'vons.

The Schedule referred to in thse Letters Patent and making part of the same.

To all whom it may concern:

Beit known that I, J OSEBH'FARCOT, of St. Ouen', (Seine,) Empire of France, have invented :i newand useful Improvement in Governors for Marine or other Engines; and Ido hereby 'declare that the following is a clear, full, and exact description of the same, ret'- erence being had to the accompanying drawings, forming part of this specication, in which- Figure l is avertical centralsection ot' my improved governor;

Figure 2 isa sectional plan of .the same; and

Figure 3 is 'a sectional view of the cylinder, taken on a plane at right angles to the on'e represented in -ii 1.

Similar letters of reference indicate corresponding parts in the several figures.

' rlhis invention relates to that class of pendulum governors which are more especially used for marine engines, and is designed as a substitute for the four-ball governor.

'The improvement consists in the construction of a single pendulum, with two balls, the weight of which is held in equilibrium by a counter-balance, placed on the vertical axis' of rotation.

It furtherconsists of a no vel device for changing the velocity ofthe balls without stopping the engine.

It likewise consists in the application of springs, parallel to the axis of rotation, for the purposeof bringing -the balls to their normal condition, and also fgrcheclcing irregularity in the movements consequent upon shocks; I Also, the invention consists in the application of a small airfcylinder and piston around the axis of rotation, which serves as a regulator.

.To enable others skilled in the art' of constructing governors, I will proceed to describe my invention,

withyreference to the drawings;

A verticalshaft, which rotates in bearings a a, that are secured'to a iixed frame,'B,-of any suitable '0nsaid shaft, an air-cylinder, is rigidly secured, which is' provided atits upper end with pins c c, formieg centres of vibration for arms b b.

, These arms cross each other, and are provided at ltheir upper ends with the ballsd d, the movements oi' which are steadied by xedguide-rods c c.

The lower ends o f these arms b b are connected to a sliding sleeve, D, by means of jointed rods ff.

lhusia single reversed-pendulum governor is formed, the weight above the centresof vibration of which is counterbalanced by la weight, g, placed around theA shaft A, and also by the sliding pieces below the centresof vibration. I E is a horizontalfvibrating lever, the centre of vibration being movable, for the purpose of changing the normal velocity of the balls, which is accomplished in the following manner:

The lever E is shaped atone end so as to fork around a'loose sleeve, F, and engage with the same by means ofthe pins h h. The other end is held in suspension by the springs G G', which are parallel tothe axis of rotation, and are secured to an oscillating lever, t.,

able centre-pin, lf, which can'be moved by attaching a sliding block,.l, toa nut, 1n, said nutbeing operated by means of a bami-wheel, a, which is fast on the screwshaft o.

The lever E is also counterbalauced by weights p, as shown in the drawings.

.By thus changing the centre of vibration, the tension of the springs G G is also changed, and thereby raises or lowers the sleeve F, which determines the normal condition ofthe balls. i

To increase the precision of the governor, the aircylinder C is provided with a hollow piston, H, which moves on the shaft A, with the sleeves D and F, its

hollow stem being fastened to the sleeve D by the pins ls s, which pins are allowed to move freely in the slot fr ofthe shaft A.

The inside ofthe cylinder C is provided vwith a'n'air-v passage, u, formed along a raised portion of its Wall,

as distinctly shown in fig. 3.

A. slightly-conical screw, t, passes from the outside of the cylinder, through the middle of this passage, and regulatesthe passage of air from one end of the piston to the other. l

It will be seen that by the action of the piston H, 'and the springs G G', allirregularities of movements, consequent upon shocks vor other causes, are .effectually overcome, and the 'action of the governor attains a high degree of sensibility and precision throttle-valve of the engine by means ofthe bell-crank -Ia and the rod 'J.

Aany suitable manner. What I claim,:and ent, is-

wish 'to secure by Letters Patj is a slot in the lever E, for the reception of a movlhe action ofthe governor 1s transmitted ton the I Motion is imparted to the governor in the ns'ual 'on 1. The arrangement'of the arms b b, balls (l d,guide 

